Just fixed problem using google support - hooray! Can't post link as I have less than 10 posts
support.google.com/mail/answer/3038600
Excerpt:
Notifications (Android)
This information is for the Gmail app for Android 4.0 and up.
With the Gmail app for Android, you can choose how you're notified about incoming messages.
Set up your notifications
If you have multiple accounts, you can change your notification settings for each account.
Which messages do you want to be notified about?
All incoming messages
In the Gmail app, touch the menu .
Touch Settings.
Choose an account.
Make sure that Notifications is checked.
Touch Inbox sound & vibrate.
Check the box for Label notifications, or Email notifications (for non-Gmail accounts).
Choose how you want to be notified. See "Learn more about notification settings" below for more information.
For Gmail accounts, continue with the steps below.
Extra steps for Gmail accounts
Go back to the previous page and touch Manage labels.
Select an inbox category such as Social, Promotions, Updates, Forums, or Inbox.
Check the box for Label notifications and choose how you want to be notified about messages in this category.
Go back to the previous page and repeat for the rest of the inbox categories if you see them in your list. Inbox categories are at the top of the list, but not all of them are used in your account.